Patients with rheumatic heart disease who experience swelling in their feet usually suffer from heart failure. First and foremost, it is important to rest and avoid excessive exertion to alleviate the burden on the heart, ensuring adequate sleep and relaxation, maintaining a pleasant mood, consuming easily digestible foods, and following a low-fat, low-salt diet, particularly avoiding high-sodium foods. Eating foods high in sodium can lead to water and sodium retention, which increases the burden on the heart and worsens swelling. In severe cases, it is necessary to use effective diuretic medications under the guidance of a doctor to reduce the cardiac load and eliminate fluid retention.